Seems to me the really important issue here is to make it clear that 
once the mail is sent, it's gone, it's just mail, and listserv has 
nothing to do with it.

So, can you _ever_ be sure your email's been opened?  I don't think 
so.  Not if it's coming to me, because I invariably disable the 
function that would acknowledge receipt or opening.  I do it in part 
because I don't think it's anybody's business whether I received or 
opened their mail till I _tell_ them it is, and in part because I 
don't want to automagically tell some spammer that this is a live 
address.

> Though Eudora has the option, the Eudora recipient can negate it.

I'm appalled that any mailer wouldn't come with it turned off by 
default (but not actually surprised).

-- Russ

Russell Hunt
Department of English
St. Thomas University
http://www.stu.ca/~hunt/